CHRISTOPHER PHIN, MACWORLD:
"Confused about 4K video? You've come to the right place.
"Now that there’s an iPhone that can shoot 4K video—yes, yes, Android users, we see that face you’re making—we thought it was time to put together a nice, simple guide to 4K video, explaining what it is, what it means, and how—and when—to use it."
Read more and learn, here.